Rainbow-electronics MAX1802 Manual de usuario descargar pdf (Pagina 2)

MAX1802

Digital Camera Step-Down

Power Supply

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V

VDDM

= 6V, V

VDDC

= 3V, PGNDM = PGND = GND, DCON1 = REF, V

ONM

= 3V, V

ONC

= V

ON1

= V

DCON2

DCON3

= 0, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VDDM, VH, ONM to GND .......................................-0.3V to +12V

PGNDM, PGND to GND ........................................-0.3V to +0.3V

VH to VDDM .............................................................-6V to +0.3V

VL to VDDM ............................................................-12V to +0.3V

VL, ONC, ON1, FB_, DCON_ to GND ......................-0.3V to +6V

VDDC, REF, OSC, COMP_ to GND ..............-0.3V to (VL + 0.3V)

DHM, DLM to PGNDM............................-0.3V to (VDDM + 0.3V)

LXM to PGNDM ......................................-0.6V to (VDDM + 0.6V)

DL1, DL2, DL3, LXC to PGND ................-0.3V to (VDDC + 0.3V)

Continuous Power Dissipation (T

= +70°C)

32-Pin TQFP (derate 11.1mW/°C above +70°C)........889mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range. ............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

GENERAL

Input Voltage Range V

2.5 11 V

SUPPLY CURRENT

Shutdown Supply Current

(from VDDM and VDDC)

ONM

= 0 3 20 µA

FBM

= 1.5V, V

VDDC

= 0 370 600

Main DC-DC Converter

Supply Current (from VDDM)

FBM

= 1.5V, V

VDDC

= 3V 35 55

µA

Main DC-DC Converter

Supply Current (from VDDC)

FBM

= 1.5V, V

VDDC

= 3V 270 450 µA

Main plus Core Supply Current

(from VDDC)

FBM

= V

FBC

= 1.5V, V

ONC

= 3V 410 700 µA

Main plus Auxiliary 1

Supply Current (from VDDC)

FBM

= V

FB1

= 1.5V, V

ON1

= 3V 470 750 µA

Main plus Auxiliary 2

Supply Current (from VDDC)

FBM

= V

FB2

= 1.5V, V

DCON2

= 3V 470 750 µA

Main plus Auxiliary 3

Supply Current (from VDDC)

FBM

= V

FB3

= 1.5V, V

DCON3

= 3V 470 750 µA

Total Supply Current

(from VDDC)

FBM

= V

FBC

= V

FB1

= V

FB2

= V

FB3

= 1.5V,

ONC

= V

ON1

= V

DCON2

= V

DCON3

= 3V

960 1700 µA

VL REGULATOR

VL Output Voltage 6V < V

VDDM

< 11V, 0.1mA < I

LOAD

< 10mA 2.83 3.00 3.12 V

VL Supply Rejection 3.5V < V

VDDM

< 11V, V

VDDC

= 0 3 %

VL Undervoltage Lockout

Threshold

VL rising, 40mV hysteresis 2.25 2.40 2.50 V

VL Switchover Voltage to

VDDC

VL rising, 100mV hysteresis 2.3 2.4 2.5 V

VL to VDDC Switch Resistance 7 Ω

1 2 3 4 5 6 7 ... 27 28

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Rainbow-electronics MAX1802 Manual de usuario Pagina 2

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